Pen for recording instruments



May 31, 1927.

H. W. HEESCH PEN FOR RECORDING INSTRUMENTS Filed Feb. 25. 1926 INVENTOR fferc r'y Vl/.//6S 07L %z;s ATT NE Patented M er 1927.

UNITED STATES 1, 30,297 PAT'ENT' OFFICE.

HENRY W. HEESCH, OF ROCHESTER, NEW YORK, ASSIGNOR TO TAYLOR INSTRUMENT COMPANIES, OF ROCHESTER, NEW YORK, A' CORPORATION OF NEW YORK.

PEN IOR RECORDING INSTRUMENTS.

. A pplication filed February 25,1926. Serial No. 90,503.

This invention relates-topens for recording instruments, and has for an object to be relatively simple and inexpensive; and

' which will operate for relatively long in* tervals without replenishment of the supply .by its side we of the recording liquid.

Various other ob ects and advantages will be apparent from. the "following description of an embodiment of the invention, and the novel features will be. particularly pointed.

out hereinafter in connection with the apend closed. The reservoir. is provided in 75 its lateral wall with oppositely disposed apertures 18 for receiving and. mounting pended claims. 7

. In the accompanying drawings:

Figure 1 is a side elevation of the free end,

of a pen arm carrying a pen of the inverted type constr ctedin accordance with the invention; p Y f Figure'2 is'a'front-elevation of the same;

Figure 3 isa' sectional elevation of the same on a somewhat larger scale, the section being taken approximately along the line 3-3 of Figure 2;

I Figure 4 is a sectional plan of the same, with the'secti'on taken approximately along the line 44 of Figure 3;

, Figure 5 isa tional elevation of a portion of the'pe ith the section taken approximately alon the line 5-5 of Figure 3;

Figure 6 is a si elevation of the free end of a pen arm caiir ing a recording pen of the erect type also constructed in accordance with the invention; and

Figure 7 c is anotherelevation of the same.

Referring particularl to the embodiment of the inventions own -.in'Figures 1.

to 5, a cup-she dreservoir 10 is attached to an'arm or extension 11 which extends beyond an end of the reservoir and carries edge flanges 12 that extend toward one another. flanges 12 with a face of the arm serve as guides for slidingly receiving the'free endof a-pen arm 13, the latter being shouldered as at 14 to en- "gage the freeend of'the arm or extension 11 and limit the extent to whichthe pen arm will slide into the guide formed "by the flanges 12. The flanges 12 may also 'ink, such liquid will enter the 'nected by an integral strip bent into a U she d bulgev or hump 17 (see Figure 1). This slitted end of the arm 11 thus serves as a spring clamp for frictionally gripping the endof the pen arm and detachably confinng the reservoir to the pen arm.

in Figures 1 to 3 the reservoir is of the inverted type, that is, ity is secured upon the end of a dependingv pen arm. The upper end of the reservoir 10 isopen and its lower a pen spout 19. The spout 19 extends through and fills one of the apertures 18 and has a reduced shouldered end 20, which '13 received in the other aperture 19, with the shoulder fitting againsfithe inner face of the lateral wall of the reservoir. The bore 21 of the spout extends from end to. end, and thus is open at both ends exteriorly of'the reservoir through which it extends. At an intermediate point within the reservoir the spout is prov ded with a cut-away portion 22 which extends to the bore and forms a 1 branch connection thereto from the interior of the reservoir.

lrVhen the reservoir. is filled'partially or entirely with a suitable markin liquid :or

ore 21 of the spout and pass-along the same toboth of its ends. .The. spout extends from the lower part of the reservoir and terminates in a recording or marking end, so that when this marking end is placed against the surface, upon which a record is to be made, and relative movement is caused betweenthe pen and the surface, the marking liquid willleave the bore of the spout or pen and adhere to the surface, so as to leave apermanent record of the relative movementbetween the pen and surface.

The bore 21 of the spout ,is preferably very small, so that it is in effect a capillary bore,- and therefore, the markin fluid wi J not run out of the bore under or inary com ditions even though the bore is open at both ends. When the marking end of the spout engages with the surface, the capillary attraction of the surface forthe liquid in the bore causes sufiicient of the marking fluid to leave the bore and adhere to the surface, and thus leave the desired mark upon the surface during a relative'movement of the pen and surface.

The surface upon which records aremade is frequently paper or other substance which I collects dust or small fibers that adhere to the spout and tend to'clo it, and .when that occurs, it is common y necessary to clean the pen in order to open the bore- I preferably provide a small rod or wire 23 which ma be disposed in the borefrom end to en and this wire also extends from the bore at the end of the spout which terminates in the lateral wall of the reservoir,

that is, at the end opposite from the mark:

ing point. This rod or wire 23 is slightly longer than the lengthof the bore, and may be normally disposed with one end entirely within-the bore 21 or end thereof. I v The rod or wire is slightly smaller than the bore, so as not to prevent travel of the marking fluid along the bore by capillary just at the marking action, and in fact, the wire will assist this ing end of the bore in order to eject any from the spout clogging matter, and then withdrawing the wire into the here again, afterwhich the pen will function as well as ever.

The reservoir is cup-sha d inform and may be readily formed by rawing the same from sheet metal, so that the cost of such a marking. pen is relative1y small. If dethe spout where it leaves sired, and as illustrated, the arm 11 which is secured to the cup may extend for approximately the full length ofthe reservoir and have an aperture in line with the agerture 18 through which the spout exten s so as to provide a more ri id mounting for e'reservoir;

In Figures 6 and 7 I have illustrated a similar marking pen-but of the upright or erect t pe'in whichthe arm 11 depends from t e reservoir, instead of upstanding therefrom as inl igures l to 5, and thus is attachable in a similar manner to the upper free end of the pen arm 13. The parts are otherwise the same as in Figures 1 to 5, and are designated by similar reference characters.

It will be obvious that various changes in the details, which have been herein described and illustrated in order to explain the nature of .the invention, may be made by those skilled-in the art, within the principle and scope of the invention as expressed in the appended claims.

I claim as my invention: 4

1. A pen for recording instruments comprising a reservoir having a tubularmarkmg spout extending therefrom, the bore of said spout being open at both ends exte rior'ly of the reservoir and communicating at an intermediate pointwith the interior of the reservoir.

' 2. A pen for recording instruments com prisin' a. cup-shaped reservoir having space apertures in the lateral wall, a marking spout passing through and secured in said apertures and extending from the reservoir, said spout having 'a bore extending lengthwise thereof and open at both ends of the spout, and also having a branch passage opening from a point intermediate of its lengthinto the interior of, the reservoirto enable the contents of the reservoir to move through'the spent, and a wire disposed in the bore of said spout, of slightly smaller diameter than said bore and extending at one end from the bore of the spout to facilitate its manipulation in the spout for e o ting clogging matter.

HENRY W. HEESCH. 

